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Chapter 15

Chapter 15. Organic Amendments. Objectives. Explain the benefits of organic amendments Describe how to use animal manure Describe how to use biosolids Explain large-scale composting List environmental side effects of fertilizers and amendments. Terms to Know. Best Management Practices

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Chapter 15

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  1. Chapter 15 Organic Amendments Soil Science & Management, 4E

  2. Objectives • Explain the benefits of organic amendments • Describe how to use animal manure • Describe how to use biosolids • Explain large-scale composting • List environmental side effects of fertilizers and amendments Soil Science & Management, 4E

  3. Terms to Know • Best Management Practices • Biosolids • Eutrophication • Hypoxia • Mesophilic • Organic amendment • Sewage sludge • Thermophilic Soil Science & Management, 4E

  4. Benefits of manure Animal Manure Figure 15-1 Soil Science & Management, 4E

  5. Animal Manure • Problems of manure • Content of manure Figure 15-2 Soil Science & Management, 4E

  6. Animal Manure • Nutrient losses from manure Figure 15-3 Soil Science & Management, 4E

  7. Animal Manure • Handling manure Figure 15-4 Soil Science & Management, 4E

  8. Animal Manure • Handling manure • Best Management Practices Figure 15-7 Soil Science & Management, 4E

  9. Biosolids • Biosolids problems • Pollutants • Human pathogens • Human vectors • Other problems • Application guidelines • Criticism of biosolids Soil Science & Management, 4E

  10. Compost Figure 15-12 Soil Science & Management, 4E

  11. Fertilizer and the Environment • Animal and human health • Eutrophication and hypoxia • Energy costs • Human changes in global nitrogen cycles • Best Management Practices Soil Science & Management, 4E

  12. Summary • Manure, biosolids, and compost double benefit • Contain nutrients • Provide organic matter • Biosolids: recycled “human manure” • Composting reduces C:N ratio • Improper use can harm environment Soil Science & Management, 4E

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